This text is machine translated.
Useful information about fuse holders
Fuse holders are holding devices for electrical and electronic fuses. They are available for different types of fuses, such as fine fuses, flat fuses, micro fuses or car fuses. A fuse holder is an electromechanical component into which the fuse is inserted. The matching electronic contacts in the fuse holder housing ensure that the fuse conducts current during operation and is triggered in the event of relevant events. In addition to fuse holders, this category also includes fuse retaining springs, fuse covers, fuse testers and fuse draw as accessories.
-
How do fuse holders work?
-
Which fuse holders and what accessories are available?
-
How do ich find a suitable fuse holder?
-
How are fuse holders installed?
-
Note on installing fuse holders
How do fuse holders work?
Fuse holders are adapters for inserting electronic fuses. They are installed in electronic devices, on machines, in fuse boxes and on-the-fly on electrical lines. The fuse holder is an electromechanical component:
-
The fuse is mechanically fastened in the fuse holder or the fuse holder self-fixed
-
The input and output cables of the fuse are electrically connected to the fuse holder, which has corresponding electrical contacts for the fuse to be inserted.
The use of fuse holders enables the quick and easy exchange of fuses. Because the electric cables are connected to the fuse holder and not to the fuse, not all solder connections need to be replaced, but only the fuse itself
Which fuse holders and what accessories are available?
Fuse holders are available in different versions. They differ in the type of bracket and the type of fuse for which they are suitable. For example, they are plug-in, clamp-on or screw-on devices for fine-wire fuses, flat fuses or special fuses such as photovoltaic fuses.
CAR fuse holder
Motor vehicle fuse holders are especially suitable for fuse types that are typically used in vehicles. In vehicles, for example, the interior lighting, the headlights or electric disc lifters are electrically secured.
Illustration of the car fuse holder for standard flat fuse with cover
Torpedo fuse holder
Cylinder fuse holders are used in various areas. They hold cylindrical fuses. These are used in electrical installations, but also in high-voltage networks and fulfill various special functions as fuses.
Illustration of the cylinder fuse holder
SMD fuse holder
SMD fuse holders are suitable for surface mounting as surface mounted device (SMD). The solder points for the fixed application to another component are already present with them.
Illustration of SMD fuse holder from below
This accessory for fuse holder is required
In addition to the actual holders, we also offer a wide range of accessories:
Fuse retaining spring
Fuse retaining springs are simple metal fuse holders. her electrical contact with the connection cable is established. They are used either as rudimentary fuse holders without insulation or as a replacement component in a larger fuse holder.
Figure: Fuse retaining spring for fine fuse
Fuse cover
Fuse covers are used to increase the protection class of fuse holders with inserted fuses. The additional cover covers the electronic contacts and thus prevents unwanted contact or harmful contact with dust and other environmental influences.
Illustration of the flat fuse cover
Fuse tester;
Fuse testers are test devices to check the function of fuses. To check, the fuse tester is stopped at the terminals of the fuse. A status light indicates the function of the fuse: If the fuse is intact, an LED lights up, but if the fuse is defective, the indicator light does not light up.
Illustration of the fuse tester
Fuse puller
Fuse puller makes it easy to install and remove fuses in hard-to-reach locations.
Illustration of locking puller with grip surface for easier handling
How do ich find a suitable fuse holder?
As a rule, the fuse is first selected, then a suitable fuse holder.
If you are looking for a suitable fuse holder, you can select your fuse type in the filter "suitable for". Fuse holders are then displayed for this purpose. Fuse holders for are available for selection
- Fine fuses with different dimensions
- Blade-type fuses (standard, mini and micro)
- High output safety
- Miniature Fuses
- MELF fuses for SMD designs with two connections
- Photovoltaic Fuses
- Fuse strips
- UMF miniature fuses
An alternative approach to finding fuse holders for fine and flat fuses is to select from the cross section of the electrical contacts on the fuse holder. After this, you can also filter your search results to display only relevant products
Electrical parameters and other specifications for fuse holders
Caution: When selecting a fuse holder, it is not only important that the fuse fits into the holder.
The electronic parameters for the nominal voltage and nominal current of the fuse holder must also be suitable for the application purpose. After all, the cables and electrical contacts for supplying the fuse are usually in the fuse holder. From the fuse holder as an electromechanical component, the actual fuse obtains both voltage and current, which are decisive for your operation and the correct tripping behavior.
Safety note: When selecting a fuse holder, pay attention to the specifications in the technical data so that the rated voltage and rated current are correctly measured, among other things. Otherwise, there is a risk that the inserted fuse will not trip properly.
Protection classes
Protection classes of fuse holders are specified in IP codes. These can be found in the technical data. The respective protection class indicates the level of touch protection and protection against environmental influences such as dust or water:
- A high degree of protection is required, especially in the case of direct user contact by non-specialists. The inserted fuses can only be easily replaced with the corresponding fuse holders.
- In humid environments, only high-protection fuse holders should be used to prevent water from passing the fuse as a medium.
- There are suitable covers for some fuse holders to increase the protection class.
Status Indicator
Fuse holders with integrated status indicators are convenient. The fuse holder with a status indicator indicates whether the inserted fuse is functional or defective. This saves the effort of pulling each fuse individually in case of technical problems and testing it with a fuse tester. Usually, the status display is done via small LED-lamps.
Illustration of the fuse holder for a car with a status indicator
How are fuse holders installed?
First: The connection between the fuse holder and the inserted fuse is always detachable to enable the replacement of the fuse. Finally, the straightforward interchangeability of the fuse is the main benefit when using a fuse holder as an adapter between the fuse and the connected circuit.
The types of mounting for fuse holders differ in terms of mounting effort and durability of the mechanical and electrical connections between fuse holders, components and supply lines. There are fixed installations, plug-in installations and flying montages:
Fuse holders are usually permanently installed. The fuse holder is thereby fixed by solder or print connections. The following mounting types are available for fixed installation:
- Fitting the detector
- Structure (as a survey, for example in the fuse box)
- PCB mounting (for industrial production of electronic components, for hobbyists)
In addition, some fuse holders are suitable for plug-in mounting. The fuse holder is first inserted into the circuit; the fuse is then plugged into it. This procedure is called snap-in, the corresponding fuses are called snap-in fuses. They are usually used for very low voltages.
The mounting of fuse holders on a DIN rail is an intermediate path between the fixed installation and the quick-release plug connection. In electronic laboratories, this type of assembly is often used for development and testing purposes.
There are flying mounting points for fuse holders on electric cables such as cables. Some of them contain functions for strain relief.
Figure: Fuse holder for DIN rail mounting
Note on installing fuse holders
Only a specialist in electrical engineering should carry out the installation of safety holders. If errors occur, the function of the inserted fuse is not guaranteed and there is a risk of considerable damage. In addition, various liability claims due to improper use of fuse holders will lapse.